Because we can't divide by zero, csc(θ) is undefined when θ = 0°, so the correct option is A.
For what value of θ is csc(θ) undefined?
First, remember that:
[tex]csc(\theta) = 1/sin(\theta)[/tex]
And also remember that we can't divide by zero.
Then the function csc(θ) is undefined for the values of θ such that sin(θ) = 0.
We know that sin(0°) = 0.
Then csc(0°) is undefined. This means that the correct option is the first one.
If you want to learn more about trigonometric functions:
https://brainly.com/question/7331447
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